Tank-heater



T. SEVERSON. TANK HEATER. APPLICATION FILED MAR-28,1917.

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UNITED STATES PATENT onnron.

THOMAS SEVERSON, OF DULUTH, MINNESOTA, ASSIGNOR TO DULUTH CORRUGATING & ROOFING COMPANY, OF DULUTH, MINNESOTA, A CORPORATION OF MINNESOTA.

TANK-HEATER.

Specification of Letters Patent.

Patented Apr. 20, 1920.

Application filed March 28, 1917. Serial No. 157,901.

To all whom it may concern:

Be it lmown that I, THOMAS SEvnRsoN, a citizen of the United States, residing at Duluth, in the county of St. Louis, State of Minnesota, have invented certain new and useful Improvements in Tank-Heaters, of which the following is a specification.

This invention relates to improvements in heaters of the submerged type, peculiarly adapted for heating water. in tanks. It is an object of my invention to provide a device of this class of light, inexpensive and durable construction. It is a further object to provide a device of this class with a new and improved division plate so designed and mounted as to allow for expan sion and contraction thereof, without affecting the same or the parts with which it is connected, and so designed as to be readily removed and replaced when desired. A further object is to provide a new and improved fire box for a device ofthis class which can be readily removed and replaced. It is a further object to provide a device of this class which affords a maximum heating area.

The above and other features of novelty, advantages and capabilities of my invention will become apparent from a detailed description of the accompanying drawings, in which I have illustrated one form of the invention, but the device there shown is to be understood as illustrative only, and not as defining the limits of my invention.

Figure 1 is a longitudinal vertical sectional view of a heater embodying one form of my invention, and

Fig. 2 is a vertical cross-sectional view of the same taken on the line 22 of Fig. 1, looking in the direction indicated by the arrows. I I

Referring to the drawings in detail, the shellof the heater comprises a normally inclined section 10, and a normally horizontal section 11 constructed of sheet metal and connected together by means of a T-iron 12, against the web of which the flanges 13 of the sections 10 and 11 are tightly drawn by means of the straps 14: and bolts 15 shown. Between the flanges 13 and the web of the T iron 12 is placed asbestos gaskets 16. The horizontal section 11 of the heater is closed by a bulkhead 17 which is tightly secured to the outward extending flange 18 on the section 11 by means of the straps 19 and bolts 20 shown. Between the flange 18 and the bulkhead 17 there is also placed an asbestos gasket 16. The bottom portion of the bulkhead extends downwardly and outwardly at right angles to form a leg or support 21, which may be secured to the bottom of the tank by means of the bolt 0. The bulkhead on the inner side extending therearound and suitably spaced from the outer edge thereof is provided with an integral shoulder 23 designed to engage the section 11 near its end on the inner surface. The forward end of the section 11 is likewise secured to the bottom of the tank by means of the leg 241, which leg is rigidly connected to the heater by means of the bolts shown. This leg 24 is bifurcated at its upper end and comprises the two arms 24:, extending one on each side of the heater and bolted or otherwise suitably secured to the straps 14. lVhen the heater is used in connection with a wood tank the legs 21 and 2 1 may be secured directly to the bottom of the tank by means of the bolts shown and thus hold the heater securely in place. \Vhen the heater is used in connection with a steel tank the legs may be secured to a wood platform, which in turn, is weighted down to the bottom of the tank to hold the heater in place.

Secured to the inner surface of the section 10 and extending from a point near the top thereof to the juncture of the two sections,

are a pair of slides 25, in which is slidably mounted a corrugated division plate 26, the inner end of which is adapted to normally overlap one end of a similar corrugated division plate 27 slidably mounted in section 11 by means of the slides 28, which slides are secured to the inner surface of the section 11 by any practical means, such, for example, as the bolts shown. The two division plates taken together form thereabove a time for directing the escaping gases out through the stack 22.

Within the heater there is a removable fire box 29 provided with a grate 3O andan ash pan 31. The fire box and ash pan as shown are formed of sheet metal. The ash pan is provided with an end portion 32 to retain the ashes while the forward end of the fire box is open to receive the fuel when fuel is added after the fire box has been placed in the heater. Connected to the outer end of the fire box is a rod 33 of sufficient length to extend upwardly to the upper end of the heater so that when it is desired to rebuild the fire all that is necessary is to raise the hinged cover 34, grasp the handle 35 and pull the firebox and the ash pan out. After the fire has been rebuilt they can be readily and quickly replaced.

To limit the downward movement of the fire box there is secured to the T iron 12 a pair of lugs 36, as best shown in Fig. 2, against which the fire grate is adapted to rest. The heat travels from thefire box through the fire grate, over the ash pan, through the combustion chamber 87, around the end of the division plate and out the the return flue, as indicated by the arrows. From this it will be seen that the heater provides a maximum heating area.

'By constructing the division plates of corrugated sheet metal they are adapted to take care of the expansion and contraction and by slidably mounting them in the heater the expansion and contraction thereof does not affect the parts to which they are connected, moreover by this arrangement they can be readily removed and replaced by simply lifting off the top 38 and withdrawing the plates from the slides.

I claim:

1. In a heater of the class described, an inclined fuel chamber, a horizontal combustion chamber, a fire box in said fuel chamber and having an ash retainer attached thereto with a grate between the ash retainer and the fire box and means for limiting the downward movement of said fire box and ash retainer, said means comprising a lug secured to the juncturebetween said fuel and combustion chambers.

2. In a heater of the class described, an inclined fuel chamber, a combustion chamber and a slidably removable corrugated sheet metal division plate mounted in each of said chambers for the purpose set forth.

3. In a heater of the class described, an inclined fuel chamber, a horizontal combustion chamber, and removable corrugated division plates slidably mounted at an angle to each other in the fuel and combustion chambers to form a fine for said heater.

4. In a heater of the class described, an inclined fuel chamber, a horizontal combustion chamber, division plates slidably mounted at an angle to each other in the fuel and combustion chambers to form a flue for said heater, said plates being transversely corrugated whereby to allow for expansion and contraction, the division plate in the combustion chamber stopping short of the end thereof.

5. In a heater of the class described, an inclined fuel chamber, a horizontal combustion chamber, an angular anchoring lug at intersection of said chambers, and a bulkhead 1n the opposite end of said combustion chamber, said bulkhead having a flanged foot, said anchoring lug and said foot being perforated whereby the device may be securely fastened to a foundation.

6. In a heater of the class described, an inclined fuel chamber, a horizontal combustion chamber, a combined fire-box, grate, and

ash pan insaid chambers, the fire-box being positioned in said fuel chamber, theash pan extending into said combustion chamber, and a handle connected with said firebox and extending to a point adjacent the upper end of the fuel chamber whereby the fire box, grate, and ash pan may be readily removed as a unit for attention.

7. In a heater of the class described, an inclined section and a horizontal section, division plates slidably mounted in said sections, respectively, to form a flue for said heater, said division plates interlocking with each other at their adjacent ends, and being removable and replaceable.

8. In a heater of the class described, a fuel chamber, a combustion chamber, a supporting plate secured atthe intersection of said chambers, and having bifurcations secured on each side, respectively, of said intersection, and having a flanged foot portion whereby the heater may be secured to a foundation within a tank.

9. In a heater of the class described, an inclined fuel chamber having'a removable fire box therein, a horizontal combustion chamber, a grate in said fire box, a portable ash pan attached tosaid fire box and grate and extending into said combustion chamber, means for removing said fire box and ash pan when desired, and a lug secured to each side of the intersection of said chambers whereby to support the fire box and ash pan in proper position. V

10. In a heater of the class described, an

inclined section and a horizontal section, a I

division plate extending the full length of said first mentioned section, and a division plate interlocking with the lower end of said first mentioned plate and stopping short of the end of said horizontal section, and 'a'fire box below said first plate whereby the incoming air will be heated, pass into the horizontal section, and then be carried back above said plates to provide the maximum of heating surface to heat the water sur- 

